Toy sink



FIG. 1 is a front perspective view of a toy sink showing my new design;

FIG. 2 is a left side elevational view thereof; the right side being substantially a mirror image;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof on a reduced scale. 

The ornamental design for a toy sink, substantially as shown and described. 